useIntersectionObserver return previous entry as well

[devth]

It seems like it'd be generally useful to have the previous entry (or list of prev entries) returned from the hook. That way client code could compare timings, e.g.

const [ entry, prevEntry ] = useIntersectionObserver(ref, {})
const timeOnScreen = prevEntry ?? entry.time - prevEntry.time

or all previous entries like:

const { entry, previousEntries } = useIntersectionObserver(ref, {})
// ... do fancy comparisons

[juliencrn]

Hi, thanks for the feedback!
I've pushed a PR that should fix it, feel free to give a code review on it.
See #464

[devth]

Amazing, thanks @juliencrn. I'll check it out!

[devth]

Hey @juliencrn, I might have missed it but I don't see a way to get the previous entry with the new code.